Network Fault

What does CnF mean?

This read-only fault code indicates a communication problem on an installed option card (e.g., a communication card). The exact nature of the fault depends on the specific network card. It means the drive cannot communicate correctly over the specified network, leading to a loss of external control, monitoring, or parameter access via that network.

• Specific communication option card (e.g., Profibus, Ethernet/IP) is not detected or improperly seated.
• Network cable damage (e.g., open circuit, short circuit, crushed cable) or improper shielding.
• Incorrect network parameters configured on the option card (e.g., baud rate, node address, IP address).
• Faulty external network device (e.g., PLC, HMI, network switch) preventing proper communication.
• Firmware incompatibility between the drive's main board and the installed network option card.

Click steps to track your progress.

1. 1

   1. Verify the network option card is securely seated in its expansion slot; carefully re-seat if necessary.

2. 2

   2. Inspect the network cable for physical damage and check continuity between connector pins using a multimeter.

3. 3

   3. Confirm network parameters (e.g., P7-XX for address, P7-YY for baud rate) match the network specifications.

4. 4

   4. Check the status LEDs on the network option card for specific error indications (refer to card's manual).

5. 5

   5. Isolate the drive from the main network and attempt communication with a known good external device (e.g., laptop with network utility).

6. 6

   6. Verify that required network cable termination resistors (e.g., 120 Ohm for RS485) are correctly installed at bus ends.